.box 
    &-border
        box-sizing border-box

    &-content
        box-sizing content-box

.display
    /
        .block
            display block

        .inline
            display inline

        .inline-block
            display inline-block

        .hidden
            display none

        .table
            display table

        .grid
            display grid

.position 
    /
        .sticky
            position sticky

        .static
            position static

        .relative
            position relative

        .absolute
            position absolute

        .fixed
            position fixed

.overflow
    &-hidden
        overflow hidden

    &-auto
        overflow auto

    &-scroll
        overflow scroll
    
    &-visible
        overflow scroll

.flex1
    flex 1
